[Mne_analysis] modify the channel

[Phillip Alday]

Please keep the list in CC.

The channels module has the tools to load and manipulate montages (both
custom and built-in):

https://mne.tools/stable/python_reference.html#module-mne.channels

I would not recommend modifying the actual files for the built-in
montages because that would change the behavior of MNE for all data,
including examples that depend on the built-ins working as they are
distributed.

For the difference between montage and layout, see the glossary
(https://mne.tools/stable/glossary.html), but here the relevant points:

layout

    A |Layout|
    <https://mne.tools/stable/generated/mne.channels.Layout.html#mne.channels.Layout>
    gives sensor positions in 2 dimensions (defined by |x|, |y|,
    |width|, and |height| values for each sensor). It is primarily used
    for illustrative purposes (i.e., making diagrams of approximate
    sensor positions in top-down diagrams of the head, so-called
    topographies or topomaps).

montage

    EEG channel names and the relative positions of the sensor w.r.t.
    the scalp. While layout are 2D locations, montages give 3D
    locations. A montage can also contain locations for HPI points,
    fiducial points, or extra head shape points. See |DigMontage|
    <https://mne.tools/stable/generated/mne.channels.DigMontage.html#mne.channels.DigMontage>
    for the API of the corresponding object class.

HTH

Phillip

On 10/7/20 1:23 pm, Abdallah Qusaibe wrote:
> Hi Phillip,
>
> I hope you are well,
>
> Yes the montage file of the sensors, do you know how can I modify it?
> for example to modify the orientation of the sensor,
>
> Regards
> Abdallah
>
> On Fri, 10 Jul 2020 at 13:17, Phillip Alday <phillip.alday at mpi.nl
> <mailto:phillip.alday at mpi.nl>> wrote:
>
>     Hi,
>
>     What do you mean with channel file? The montage file with
>     electrode coordinates and names? Can you tell us more about what
>     the end goal is / why you want to modify this file?
>
>     Best,
>
>     Phillip
>
>     On 10/7/20 12:23 pm, Abdallah Qusaibe wrote:
>>
>>             External Email - Use Caution        
>>
>>     Dear Mne community,
>>
>>     Can you please give me a real example, how can I modify the
>>     channel file?
>>
>>     Kind regards
>>     Abdallah
>>
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>>     Mne_analysis at nmr.mgh.harvard.edu <mailto:Mne_analysis at nmr.mgh.harvard.edu>
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